Mold-jacket and method of making the same.



I. F. WEST.

MOLD JACKET AND METHOD OF MAKING THE SAME.

APPLICATION FILED MAY 2, 1917.

1 88,325 Patented Dec. 17, 1918.

2707222 F W255 y 2 fliiornayg,

UNITED STATES FATENT OFFICE.

JOHN F. WEST, OF LANCASTER, NEVT YORK.

MOLD-JACKET AND METHOD OF MAKING THE SAME.

Application filed May 2. 1917.

'1 b all whom it may concern Be it known that 1, JOHN F. Wnsr, a citizenof the United States, residing at Lancaster, in the county of Erie andState of New York, have invented new and useful Improvements inMold-Jackets and Methods of Making the Same, of which the following is aspecification.

This invention relates to the tapering mold jackets employed infoundries for supporting the molds made in snap-flasks and to a methodof making the same.

In order to properly support all portions of such molds to preventcracking or breaking thereof during the pouringoperation, it iscustomary to make the jackets of such height and dimensions that whensnugly fitted over the molds they terminate no less than an inch fromtheir top and bottom.

As is well known, the level or elevation of the parting line of suchmold varies according to the nature of the articles to be cast, the linebeing near the horizontal center of the mold in some cases and a greateror less distance from it. in others. According to the present practice,such jackets are laid out or measured on the parting lines oi the moldsaS a basis. For example, if the external width of such a mold is eightinches at the parting line, the corresponding contiguon portion of thecompanion acket 1 5 made of the same internal width. While thatparticular jacket will properly fit and support molds with thatparticular parting lme, it will not properly fit other molds of the sameheight having their parting lmes located at a different height or level,even though their width at the parting lines s the same. Obviously, ifthe parting l1ne s higher than that on which the jacket is lald out, thejacket will stop or stand higher on the mold and leave its lower portionuncovered and unsupported to an excessive extent, while if the partingline is lower, the jacket will descend too far over the mold and leaveits upper portion uncovered to an objectionable degree. It follows thatby this method of laying out mold jackets, as many separate and distinctjackets are required for molds of the same height as there are differentparting lines in that slze, necessitating not only the use of a largenumber of jackets and entailing a corresponding expense for repair andrenewals, but also requiring considerable space for thelr storage.

The aim of my invention is the production Specification of LettersPatent.

Patented Dec. 17, 1918.

Serial No. 166,000.

of a universal mold jacket which will fit series of molds ofsubstantially the same height or size but having difierently-locatedparting lines, thus greatly reducing the number of jackets required fora given variety of molds and correspondingly lessenmg the outlay forthis foundry-item, as well as economizing in storage space.

To that end my invention consists of a jacket laid out on the horizontalmedian line of the molds instead of their varying parting lines.

In the accompanying drawings:

Figures 1% are transverse vertical sections of a series of ordinary sandmolds of about the same dimensions having different parting lines andsupported by their companion jackets. Figs. 5-8, inclusive, are similarsections, showing the impracticability of asingle jacket of ordinaryconstruction for more than one of such molds. Figs. 9-12, inclusive, aresimilar sections of the same series of molds supported by my improvedjacket, showing it universal applicability to entire series. Fig, 13 isa. perspective view of one of the improved jackets.

Similar characters of reference indicate corresponding parts throughoutthe several vlews.

Referring to Figs. l-t, the parting lines 1) of the tour ordinary moldsA, B, C and D, are located at difierent levels, but the molds are all fthe same width at their parting lines, say eight inches, for example.The ordinary companion jackets l, 2, 3 and 4, for those molds are laidout on those parting lines, respectively, with the result that whileeach fits its own mold it will not properly fit any of the rest. Byreference to Figs. 1 to 4, it will be seen that the several jackets fittheir respective molds, the lay-out line Z of each jacket coincidingwith the parting line 3? of the companion mold. But when it is attemptedto interchange these jackets none of them will properly support themolds. As seen in Fig. 8, if the jacket 1 be placed over the mold D, itcan descend no farther after its lay-out line registers with the partingline of that mold, the jacket projectmg a considerable distance abovethe mold and leaving its base and middle portions unsupported. The sameis true when the jacket 2 is placed on the mold C; while when thejackets 3 and 4: are applied to the molds A and B, they fit them soloosely that no parts of the molds are supported.

snap-flasks with different parting lines is to As before brieflydescribed, each of my improved jackets 5, shown in Figs. 9-12, isconstructed or laid out on the horizontal center or median linem of aseries of molds, A B C D of substantially the same height or size havingparting lines at different levels, but regardless of those lines, thelay-out line of the jacket being dotted and designated Z By thisconstruction of the jacket, its lay-out line coincides with the medianline of each and all of the corresponding series of molds, suiting oneand the same jacket to the entire series and properly fitting andsupporting any one of them, as is obvious from a comparison of Figs.9-12, each of the four jackets there shown being interchangeable withany one of the other three and each fitting any of the four molds,irrespective of the difierent levels of their parting lines. Each jacketis thus universally applicable to a series of molds with differentparting lines but of approximately the same height or size.

By this improvement, the number of jackets required for a given varietyof molds is very materially educed, effecting an important saving in thecost of jackets and their repairs and renewals, and also in the amountof floor space required fortheir storage.

The present practice of building a serles of start an inch and a halffrom the bottom of the fiask'and make successive partings every halfinch to within an inch and a half from the top; that is, 111, 2, 2%, 3inches, and so on.- By this construction, nine different sizes ofjackets are required for the usual variety of molds made in a snap flask16 inches long, 12 inches wide and 7 inches high. By the use of thisimprovement, but a singlesized jacket is required for the same varietyof molds, one size doing the work of nine 21 messes sizes of ordinaryconstruction. This material gain is due partly to the fact that only asingle jacket or a given size is required for molds of somewhatdifferent heights, say seven and eight inches, respectively. On aseven-inch mold a sand margin of half an inch is left above and belowthe jacket, whereas on an 8 inch mold a sand margin of one inch isobtained with the same sized jacket.

While affording these important advantages, the improved j acketcan beconstructed as cheaply as those now in common use.

The mold jackets may be providedwith rigid or movable or adjustablewalls. I do not Wish to limit myself to any particular construction ofjacket, except as defined in the appended claims.

The snap-flasks in which the molds are made are laid out in the samemanner as the mold-jackets herein shown and described. Such flasks andtheir method of construction will form the subject of a separateapplication for patent.

I claim as my invention:

1. lhe combination with a series of tapering sand-molds of substantiallyuniform size having differently-located parting lines, of a taperinguniversal jacket applicable to all of said molds and constructed of thesame interior dimensions at its horizontal median line as the externaldimensions of the molds at their median line. 7

2. The hereindescribed method of laying out a tapering universal moldjacket to fit a series of sand molds with difierent parting lines, whichconsists in so constructing the jacket that its internal dimensions atits horizontal median line are the same as the external dimensions ofsaid series of molds at their horizontal median lines.

' JOHN 'F. WEST.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

